Due to the devastation and upheaval caused by Hurricane Harvey, the Internal Revenue Service is providing extra time for certain individuals and businesses to file their returns and pay taxes.  Among the relief provided is a new January 31, 2018 filing deadline for individual taxpayers who have valid extensions until October 16 and businesses which have extensions until September 15.  According to IR-2017-135:

“The IRS is now offering this expanded relief to any area designated by the Federal Emergency Management Agency (FEMA), as qualifying for individual assistance. Currently, 18 counties are eligible, but taxpayers in localities added later to the disaster area will automatically receive the same filing and payment relief.”

The IRS has set up a landing page to assist victims of Hurricane Harvey.

Update: The IRS has extended similar relief to victims of Hurricane Irma.